Preface While writing the third edition@ I have carefully considered the comments received from readers all over the world. One engineer remarked that whenever he has new trainees in his brake department@ they must read Limpert's brake book. Following that mandate I have added explanations and examples to the theoretical analysis of braking and brake temperature while retaining the practical aspects of brake system design. Electronic system controls have significantly increased the potential of braking systems. Notwithstanding the advances made in applying brakes by mechanical@ hydraulic@ or electrical means@ vehicles are slowed and stopped by friction between pad and rotor. Only when the underlying brake system is properly engineered will automatic controls perform effectively and vehicles brake safely under all foreseeable operating conditions. The third edition provides the fundamental tools necessary to design efficient braking systems that will comply with safety standards@ minimize consumer complaints@ and perform safely and efficiently long before and while electronic brake controls become active. New to the readers is the brake design software@ developed by the author as an effective companion tool to this edition. The efficient design of automotive brake systems@ including trucks and trailers@ with PC-BRAKE software is demonstrated with detailed examples. Automotive engineering students@ brake engineers@ and forensic experts will benefit greatly from the third edition in conjunction with the computer programs and brake design workshop available from the author's website www. pcbrakeinc.com.